Ceria nanoparticle vesicles formed in sodium oleate aqueous solution with mesoporous silica coating

- An environment-friendly method preparing nanoparticle vesicle was presented.
- The vesicle consists of hollow assembly of ceria nanoparticle with outer silica shell.
- A self-assembly structure formed in the suspensions of ceria nanoparticle and sodium oleate.
- The novel method can be applied to the preparations of various kinds of nanoparticle vesicles.